Sewing machine frame structure



Jan. 11, 1-938. P. P. KESSLER SEWING MACHINE FRAME STRUCTURE Filed Feb.10, 1936 3 Sheets-Sheet l Jizmsvzfar: fizafffeaafer: [Z @W W Jan. 11,1938. P. P KESSLER SEWING MACHINE FRAME STRUCTURE Filed Feb. 10, 1956 5Sheets-Sheet 2 Jan. 11, 1938. P. P. KESSLER SEWING MACHINE FRAMESTRUCTURE Filed Feb. 10', 1936 3 sheetssheet 3 Patented Jan. 11, 1938UNITED STATES PATENT OFFICE My invention relates to a sewing machineframe structure.

Among the objects of my invention are the following: to create a sewingmachine frame 5 structure having an upper portion so attached to a lowerportion as to permit both lateral and vertical movement of the upperportion with relation to the lower portion thuspermitting both desiredofl' center stitching and the accommoda- 10 tion of difierentthicknesses and kinds of materials, and such other objects, advantagesand capabilitiesas will later more fully appear and which are inherentlypossessed by my invention.

While I have shown in the accompanying draw- 15 ings a preferredembodiment of my invention yet I wish it understood that the same issusceptible of modification and change without departing from the spiritof my invention.

Figure 1 is a side elevation of the sewing ma- 20 chine embodying theseveral features of my invention. I

Figure 2 is a front elevation of the same. Figure 3 is a rear elevationof the same. Referring more particularly to the embodiment 5 selected toillustrate my invention, it comprises a frame Ill of two partshaving abase or lower portion H, and an upper portion l2, movably attached tosaid base H by a pair of adjustable hinge screws. l3. By the use of myadjustable 30 hinge screws I 3, I am able to move" the upper portion l2of the frame Ill laterally, either to the left or to the right so thatthe stitching member 65 is thereby positioned of! center for the purposeof stitching in a desired off center man- 35 ner. Integral and extendingfrom the rear of the upper portion I2 of the frame I is an extension l4,having a hole ii, for receiving a bolt H.

A member 16 preferably extends through an open portion of the lowerportion II and contacts 40 lever l9 which is fulcrumed on shaft-l8.Adjacent its upper end member l6 has a slot 1| slidably receiving bolt11. Prior to adjustment, bolt I 1 is loosened so that member I 6 may bemoved so that bolt I1 is in the desired position within 45 slot H. Whenthe bolt I1 is tightened, member 16 is positioned to correctly allow thedesired lifting clearance of the upper portion l2 as it is liftedvertically and arcuately to accommodate the desired thickness ofmaterial. Bolt I! may 50 be loosened whenever desired and member I 6moved so that bolt I1 is locatedin a different position within slot Hand then tightened for permitting a different desired lifting clearance.The lifting operation is effected through lever 55 I9 which isfulcrurned on shaft l8 and has one arm normally in engagement withmember I to impart movement to member 18 upon pressure being applied tolever l9. 0! course the adjustment through members II and i6 is toprovide lifting clearance during the sewing operation independently ofthe lifting by lever l9. This insures not only proper clearance butproper pressure on different thicknesses andkinds of materials to thehighest degree of accuracy.

The lower portion ll of the frame l0 houses 10 the feeding mechanism 31.of the construction defined and claimed in my co-pending application,Serial No. 78,051, filed May 5, 1936.

Having thus described my invention I claim:

1. In a sewing machine frame structure. a body member' having a lowerportion and a separate upper portion, and adjustable means movablyattaching said lower and upper portions, said means permitting lateraladjustment of the upper portion for desired off center stitching.

2. In a sewing machine frame structure, a body member having a lowerportion. and a separate upper portion, and a pair of adjustable hingescrews for movably attaching said lower and upper portions, said hingescrews, permitting lateral adjustment of the upper portion for desiredofi center'stitching.

3. In a. sewing machine frame structure, a body having a lower portioncarrying a feeding mechanism, and an upper portion carrying a stitchingmechanism, adjustable means for attaching said upper portion to saidlower portion to permit both lateral adjustment of said upper portionwith respect to said lower portion for desired oif center stitching, andalso vertical movement of said upper portion with respect to said lowerportion to accommodate different thicknesses andkinds of material, saidupper portion adapted to act of its own 'weight'as a pressure meansduring a sewing operation. 40

4. In a sewing machine frame structure, a body having a lower portioncarrying a feeding mechanism, and an upper portion carryin a stitchingmechanism, adjustable means for attaching said upper portion to saidlower portion to permit both lateral adjustment of said upper portionwith respect to said lower portion for desired oil. center stitching,and also vertical movement of said upper portion with respect to saidlower portion to accommodate different thicknesses and kinds ofmaterial, said upper portion adapted to act of its own weight as apressure means during a sewing operation, adjustable means attached tosaid upper portion for controlling the desired lifting clearances of theupper portion with respect to the lower portion and manually operablemeans for lifting said upper portion.

5. In a sewing machine frame structure a lower portion, an upperportion, means for movably attaching the upper portion to the lowerportion, said upper portion having an extension, said extension having abolt, a member having a slot, said bolt slidable within said slot andadapted to be tightened at any desired position within said slot so asto permit desired lifting clearances of the upper portion with respectto the lower portion for accommodating difierent thicknesses of materialand manually operable means engageable with said member for lifting saidupper portion.

6. In a sewing machine frame structure, a body member having astationary lower portion carrying a feeding mechanism and a separateupper portion carrying a stitching mechanism, a hinge for attaching theupper portion to the lower portion to permit vertical movement of theupper portion and the stitching mechanism it carries with respect tothelower portion and its feeding mechanism, said upper portion adapted toact of its own weight as a pressure means so that during the sewingoperation the stitching mechanism will automatically adjust itself to iapply the proper pressure on difierent thicknesses and kinds ofmaterial.

' PAUL P. KESSLER.

